Question:
My Q6600 currently is running at 400x8 @ 1.375v.
When I run Prime95 for Small FFTs, it brings no error for half an hour.
But when I run the Blend test, the error comes out in 5 minutes like that.
Roughly what can cause error like that?

My setup is:
Q6600 @ 400x8 @ 1.375v
Corsair XMS2 @ 5-5-5-15 @ 400x2.0 @ 1.8v
GA-G31M-ES2L
CM Extreme Power 500w

I don't plan to go for further overclocking, so I guess my rig suppose to be enough already.